Small button/disk batteries can be swallowed by young children

Aug. 8, 2011 - PRLog -- Almost any liquid or moist object that has enough ions to be electrically conductive can

serve as the electrolyte for a cell. As a novelty or science demonstration, it is possible

to insert two electrodes made of different metals into a lemon,potato,[84] etc. and

generate small amounts of electricity. "Two-potato clocks" are also widely available in

hobby and toy stores; they consist of a pair of cells, each consisting of a potato (lemon,

et cetera) with two electrodes inserted into it, wired in series to form a battery with

enough voltage to power a digital clock.   http://www.happybattery.com.au/laptop-battery/Sony/VGP-BPS13/S.htm   Sony VGP-BPS13/S battery Homemade cells of this kind are of no real

practical use, because they produce far less current—and cost far more per unit of energy

generated—than commercial cells, due to the need for frequent replacement of the fruit or

vegetable. In addition, one can make a voltaic pile from two coins (such as a nickel and a

penny) and a piece of paper towel dipped in salt water. Such a pile would make very little

voltage itself, but, when many of them are stacked together in series, they can replace

normal batteries for a short amount of time.http://www.happybattery.com.au/laptop-battery/Sony/vgp-bp...   Sony vgp-bpl4 battery

Sony has developed a biological battery that generates electricity from sugar in a way that

is similar to the processes observed in living organisms. The battery generates electricity

through the use of enzymes that break down carbohydrates, which are, in essence, sugar.

A similarly designed sugar drink powers a phone using enzymes to generate electricity from

carbohydrates that covers the phone’s electrical needs. It needs only a pack of sugary

drink and it generates water and oxygen while the battery dies out.

http://www.happybattery.com.au   laptop battery

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One of the worst things that can happen while working on a laptop is to have your Laptop Battery die mid-project. To avoid this, it's good to know how much life your battery has left in it.